The draft code states that "hot tea, coffee and low calorie hot chocolate are allowed although their nutritional value is minimal".

It continues: "They are included because the rules concerning food in schools affect the adults who teach and work in schools as well as some sixth forms, and as long as they are not consumed in excess, they have no adverse nutritional effects in either adults or older pupils.

"These drinks are unlikely to be offered to younger students because of the dangers of nutrient displacement of healthier drinks, the inappropriate addition of stimulants, and for safety reasons relating to the handling of hot beverages."

'Institution'

Parents and others with an interest in children's nutrition are being invited to take part in the public consultation exercise.

The SFT is emphasising that there will be no outright ban of tea and coffee in schools, but if the public wants to see further restrictions, they would "consider" including such recommendations in the code's final version.

An SFT spokeswoman said: "There has already been widespread buy-in from manufacturers to the spirit of the voluntary code and we are confident that the code will be widely supported by local authorities and schools.

"However, the 'British cuppa' is an institution and whilst we work hard to ensure young people have a varied and balanced diet we have never directly or indirectly suggested that the code should ban tea or coffee from schools - neither will be suggesting so."

The Association of School and College Leaders (ASCL) does not appreciate the SFT's actions.

ASCL general secretary Dr John Dunford said: "This is another example of the SFT trying to micro manage schools with the sort of decision that should be left to head teachers.

"I think heads are getting really fed up with being told how to manage the detail of school life."

Children's Minister Kevin Brennan said there would be no ban.

"Generations have grown up loving a cuppa - it's a staple of our national diet and nothing will change that."

The SFT plans to publish the final version of the code soon after the close of consultation (29 February), when all of the responses have been collated and summarised.

A supporting document will be published on the trust's website in spring 2008.

The code has been developed by a group of interested parties including drinks manufacturers, representatives of the drinks industry, food wholesalers and distributors, and others interested in promoting the nutritional welfare of children in school.

The SFT has pledged to review the code annually and update it as necessary.